import Vue from 'vue'
import VueRouter from 'vue-router'
//import Login from '../components/Login.vue'
//import Home from '../components/Home.vue'
//import Welcome from '../components/Welcome.vue'
//import Users from '../components/users/Users.vue'
//import Rights from '../components/power/Rights.vue'
//import Roles from '../components/power/Roles.vue'
//import Cate from '../components/goods/Cate.vue'
//import Params from '../components/goods/Params.vue'
//import List from '../components/goods/List.vue'
//import Add from '../components/goods/Add.vue'
//import Order from '../components/order/Order.vue'
//import Report from '../components/report/Report.vue'

//import函数实现路由懒加载，实现网页快速打开的性能优化
const Login = () => import("../components/Login.vue")
const Home = () => import('../components/Home.vue')
const Welcome = () => import('../components/Welcome.vue')
const Users = () => import('../components/users/Users.vue')
const Rights = () => import('../components/power/Rights.vue')
const Roles = () => import('../components/power/Roles.vue')
const Cate = () => import('../components/goods/Cate.vue')
const Params = () => import('../components/goods/Params.vue')
const List = () => import('../components/goods/List.vue')
const Add = () => import('../components/goods/Add.vue')
const Order = () => import('../components/order/Order.vue')
const Report = () => import('../components/report/Report.vue')


Vue.use(VueRouter)

const routes = [
  { path: '/', redirect: '/login' },
  { path: '/login', component: Login },
  { 
    path: '/home', 
    component: Home,
    redirect:'/welcome',
    children:[
      {
        path:'/welcome',
        component:Welcome
      },
      {
        path:'/users',
        component:Users
      },
      {
        path:'/rights',
        component:Rights
      },
      {
        path:'/roles',
        component:Roles
      },
      {
        path:'/categories',
        component:Cate
      },
      {
        path:'/params',
        component:Params
      },
      {
        path:'/goods',
        component:List
      },
      {
        path:'/goods/add',
        component:Add
      },
      {
        path:'/orders',
        component:Order
      },
      {
        path:'/reports',
        component:Report
      }
    ]
  },
]

const router = new VueRouter({
  routes
})
//设置路由导航守卫
router.beforeEach((to,from,next)=>{
  //to 将要访问的路径  from 从哪个路径来  next 是否允许跳转( next()允许跳转 next('/xxx')跳转到指定页面 )
  if(to.path === '/login') return next();
  //获取token
  const tokenStr = window.sessionStorage.getItem('token');
  //没有token 强制跳转到登录页
  if(!tokenStr) return next('/login');
  next()
})

export default router
